We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Visible Light-Assisted Photoreduction of Graphene Oxide Using CdS Nanoparticles and Gas Sensing Properties.
- Authors
Hasani, Amirhossein; Sharifi Dehsari, Hamed; Amiri Zarandi, Ali; Salehi, Alireza; Taromi, Faramarz Afshar; Kazeroni, Hanif
- Abstract
Graphene oxide sheets suspended in ethanol interact with excited CdS nanoparticles and contributed to photocatalytic reduction by accepting electron from nanoparticle. The UV-Vis measurement showed that electrical absorbance of the CdS/graphene oxide sheets increased by decreasing the irradiation time and after 2 h it remained constant which indicates the optimum reduction time. Furthermore, the direct interaction between CdS nanoparticles and graphene sheets hinders the collapse of exfoliated sheets of graphene. The 4-point probe measurement of nanocomposite with different ratios of graphene oxide in CdS solution after irradiation shows that the conductivity of them increased by increasing the amount of GO, but further increasing causes incomplete photo reduction process due to exorbitance increasing GO sheets which contribute to decreasing the conductivity. The CdS/RGO composite material can be used as a gas sensor for CO2 based on its electrocatalytic behavior. The low-cost and easy fabrication sensor shows rapid response and high sensitivity. By varying the amount of GO the optimum concentration which shows high sensitivity is found and its good performance compared with other is attributed to its higher conductivity due to complete reduction. Moreover, the effects of thermal annealing on the conductivity of CdS/RGO film and the performance of devices are researched.
- Subjects
GRAPHENE oxide; PHOTOREDUCTION; CADMIUM sulfide; NANOPARTICLES; GAS detectors; ETHANOL; LIGHT absorbance
- Publication
Journal of Nanomaterials, 2015, Vol 2015, p1
- ISSN
1687-4110
- Publication type
Article
- DOI
10.1155/2015/930306